3. (05.02 MC)
What is the mass of a sample of NH3 containing 3.80 x 1024 molecules of NH3? (5 points)
74.8 grams
89.4 grams
101 grams
107 grams

Respuesta :

Answer:

107 g

Explanation:

need to divide by avogadro’s number

The mass of a substance is a weight that can be given by the moles. In the sample 107.27 gms of ammonia is present. Thus, option D is correct.

What is mass?

Mass or the weight of the substance can be given by the molar mass and the moles of the substance.

We know,

6.02214076 × 10²³ molecules = 1 mole of NH₃

So, 3.80 x 10²⁴ molecules = 6.31 moles

If 1 mole = 17 gm ammonia

Then, 6.31 moles = 6.31 × 17 = 107 gms

Therefore, option D. 107 gms is the mass of ammonia.

Learn more about mass here:

https://brainly.com/question/23795076

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